W3Techs tells you what the web runs. TechSpy tells you what THIS company runs.
W3Techs answers the survey question: "X% of all websites use technology Y." Great for trends. Useless when the task in front of you is one prospect.
TechSpy scans a single domain and hands back the actual stack — plus a Verdict on what it means.
Paste a domain. Get a real read in seconds. No login.
Free — no card, 30 scans/day.
Two different jobs. Most people googling "W3Techs alternative" have the second one.
W3Techs — market-share research Answers: How popular is this technology across the whole web? Use it for trend citations, adoption stats, content research.
TechSpy — per-company intel Answers: What is this specific prospect running, and what should I do about it? Use it to qualify a lead, prep a call, or size up a competitor.
Both are legit. They're just not the same tool. If you're staring at one company's URL, the aggregate stat can't help you.
Head to head
| W3Techs | TechSpy | |
|---|---|---|
| Unit of analysis | Whole-web aggregate | One domain |
| Web-wide market share % | ✅ Best in class | — |
| Per-company tech stack | Limited | ✅ Static + JS-runtime + headers |
| Sees through React / Next SPAs | — | ✅ Reads stacks that leave scrapers empty |
| DNS / DMARC / SPF / DKIM audit | — | ✅ |
| Subdomain discovery | — | ✅ Catch infra expansion before PR |
| Deep Scan (HAR / hidden APIs) | — | ✅ Headless render + network capture |
| LLM Interact (post-click surfaces) | — | ✅ |
| Verdict + Evidence + Implications | — | ✅ Opinionated read, not a list |
| Confidence markers | — | ✅ High / Med / Low |
| Export PDF / Zapier / API | — | ✅ (Max) |
Honest note: for the market-share row, W3Techs wins outright — nothing here beats it for web-wide adoption stats.
The part neither a survey nor a plain detector gives you: the decision.
A raw technology list makes you do the thinking. A market-share stat doesn't know your prospect exists. TechSpy groups every tool by what it means and closes with an actual call:
- Verdict — the one-line read on what this stack signals
- Evidence — the specific tools and signals it's built on
- Implications — what it means for your pitch, your risk, your timing
- Confidence — High / Medium / Low, so you know how hard to lean
You get an analyst's take, not a scrape.
See what an aggregate survey can't: infra, SPAs, and hidden APIs.
SPA X-ray React and Next.js sites leave most scrapers with a near-empty page. TechSpy fingerprints the JS runtime and headers to read the stack anyway.
DNS + subdomain map
Full DNS/DMARC/SPF/DKIM posture, plus subdomain discovery — spot a new app., api., or region subdomain and catch infra expansion before the press release.
Deep Scan (HAR) Headless render captures the network waterfall and surfaces hidden APIs and SDKs the static page never mentions.
When W3Techs is genuinely the better pick
Reach for W3Techs — not TechSpy — when you need:
- Web-wide adoption percentages ("what share of sites run this CMS?")
- Citable market-share data for a report, article, or pitch deck
- Historical technology-trend data over years
- Ecosystem-level study rather than a specific company
That's its home turf, and it's the authority there. TechSpy isn't trying to replace it — it does a different job.
Pricing — and the free tier already does what W3Techs isn't built for
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | 30 scans/day · tech stack · DNS / sitemap / subdomains · save & compare |
| Plus | $19/mo | + 10 Deep Scan · 5 Interact credits |
| Max | $49/mo | Unlimited scans · 50 Deep Scan · 25 Interact · Export / Zapier / API |
| Enterprise | $199/mo | Team scale + everything in Max |
The static scan returns in seconds. Deep Scan and Interact run a headless browser, so those take minutes — that's the tradeoff for seeing hidden APIs.
Scan your next prospect free
Paste a competitor or prospect domain. Get the real stack and a Verdict in seconds — no login for the free scan.
And if a site is locked down (Cloudflare, bot walls), TechSpy tells you it's blocked instead of faking a confident 100%. Integrity over a pretty number.
Scan a domain free →
Scan a domain free
See the opinionated read for yourself — no login, 30 scans/day.